[xsl] Finding Duplicates with XPath

["Rick Quatro" <frameexpert@xxxxxxxxxxxx>]

Hello All,

I have the following XML file:

<?xml version="1.0"?>
<links>
 <newlink book="Find.pdf" name="MDSearchReplace" />
 <newlink book="Find.pdf" name="MDSearch" />
 <newlink book="Find.pdf" name="MDSearch" />
 <gotolink book="System.pdf" name="fontdefine" />
 <gotolink book="System.pdf" name="graphicdefine" />
</links>

The newlink elements have to be unique within the links element. Is there a 
way I can find duplicates; for example, the second and third elements. Note 
that the duplicate elements might not necessarily be adjacent to each other. 
Thanks in advance.

Rick Quatro
Carmen Publishing
585-659-8267
www.frameexpert.com